Can a fish tank be used as incubator?

I have a large fish tank and was wondering if I put a top with air holes, a light, fan, thermometer etc like others have done with a cooler would it have any chance of working as an incubator?

I have a variety of ducks and chickens and would love to hatch some eggs, this will be my first experience with this.

I have also been reading up online trying to gather as much info as I can as far as temp. humidity levels etc. and have come to the conclusion that I would not be able to try duck eggs and chicken eggs together, as these things are different for both, is that correct?

As Pipermark said, you would lose a lot of heat through the glass so you would need to find a way to insulate the sides if you're going to do this, but at the same time, you need to have an air exchange because the eggs need oxygen to develop.